3 Rivers Little League (TRLL) is a competitive baseball and softball league serving the youth of Aspen, Basalt, Carbondale, Glenwood Springs, Gypsum, Eagle, Edwards, Avon and Vail, Colorado.

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Look for the link on the left side of the Heads Up page that says "launch the Heads Up course"
 
Make sure you print your certificate and that the certificate is dated 2020.